Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985acasn..26...62y&link_type=abstract
(Acta Astronomica Sinica, vol. 26, 1985, p. 62-68) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 9, Sept. 1985, p. 2
Astronomy and Astrophysics
Astrophysics
Microwave Emission, Solar Oscillations, Solar Radio Bursts, Diffusion Coefficient, Solar Magnetic Field, Synchrotron Radiation, Whistlers
Scientific paper
A mechanism for pulsation in solar microwave bursts is proposed in which nonthermal electrons captured in the coronal loop during the flare pulsing phase produce the smooth burst background radiation. Because of the 'settling' effect of the transition zone, electrons inside the loss cone sink into the atmosphere after reaching the transition zone, and the emission they produce is superposed on the burst background in the form of pulsations. For a magnetic dipole configuration lying below the photosphere, the period of pulsation is calculated to be between one second and one minute, the ratio of the pulse peak to the background intensity is calculated as between 0 and 100 percent, and the calculated pulse width is between 0.3 sec and 50 sec. These values are consistent with observed ones.
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